import {
  document,
	window,
	HTMLCanvasElement,
	requestAnimationFrame,
	cancelAnimationFrame,
core,
	Event,
  Event0
} from "dhtml-weixin"
import * as THREE from './three/Three';

import { MTLLoader } from 'three/addons/loaders/MTLLoader.js';
import { OBJLoader } from 'three/addons/loaders/OBJLoader.js';
import { OrbitControls } from 'three/addons/controls/OrbitControls.js';

var requestId
Page({
  onShareAppMessage(){
    return getApp().onShare()
  },
  onShareTimeline(){
     return {title:"ThreeX 2.0"}
  },
	onUnload() {
		cancelAnimationFrame(requestId, this.canvas)
		this.worker && this.worker.terminate()
if(this.canvas) this.canvas = null
		setTimeout(() => {
			if (this.renderer instanceof THREE.WebGLRenderer) {
				this.renderer.dispose()
				this.renderer.forceContextLoss()
				this.renderer.context = null
				this.renderer.domElement = null
				this.renderer = null
			}
		}, 0)
	},
  webgl_touch(e){
		const web_e = (window.platform=="devtools"?Event:Event0).fix(e)
		this.canvas.dispatchEvent(web_e)
  },
  onLoad() {
		document.createElementAsync("canvas", "webgl2").then(canvas => {
      this.canvas = canvas
      this.body_load(canvas).then()
    })
  },
  async body_load(canvas3d) {	
  let camera, scene, renderer;

  init();
  animate();


  function init() {

    camera = new THREE.PerspectiveCamera( 45, window.innerWidth / window.innerHeight, 0.1, 20 );
    camera.position.z = 2.5;

    // scene

    scene = new THREE.Scene();

    const ambientLight = new THREE.AmbientLight( 0xffffff );
    scene.add( ambientLight );

    const pointLight = new THREE.PointLight( 0xffffff, 15 );
    camera.add( pointLight );
    scene.add( camera );

    // model

    const onProgress = function ( xhr ) {

      if ( xhr.lengthComputable ) {

        const percentComplete = xhr.loaded / xhr.total * 100;
        console.log( percentComplete.toFixed( 2 ) + '% downloaded' );

      }

    };

    new MTLLoader()
      .setPath( 'models/obj/male02/' )
      .load( 'male02.mtl', function ( materials ) {

        materials.preload();

        new OBJLoader()
          .setMaterials( materials )
          .setPath( 'models/obj/male02/' )
          .load( 'male02.obj', function ( object ) {

            object.position.y = - 0.95;
            object.scale.setScalar( 0.01 );
            scene.add( object );

          }, onProgress );

      } );

    //

    renderer = new THREE.WebGLRenderer( { antialias: true } );
    renderer.setPixelRatio( window.devicePixelRatio );
    renderer.setSize( window.innerWidth, window.innerHeight );
    document.body.appendChild( renderer.domElement );

    //

    const controls = new  OrbitControls( camera, renderer.domElement );
    controls.minDistance = 2;
    controls.maxDistance = 5;

    //

    window.addEventListener( 'resize', onWindowResize );

  }

  function onWindowResize() {

    camera.aspect = window.innerWidth / window.innerHeight;
    camera.updateProjectionMatrix();

    renderer.setSize( window.innerWidth, window.innerHeight );

  }

  //

  function animate() {

    requestId = requestAnimationFrame( animate );
    renderer.render( scene, camera );

  }


  }
})